Road Stream Crossing Site AUS_PR100

Au Sable River Watershed, Grey Creek
Alvin Rd
Mikado Twp, Alcona County
Information collected by:
Huron Pines
Site Location
GPS Coordinates: 44.54631 , -83.44225
T25N R08E Sec 22,23
Owned by Private
Fish Passability 0
Perch Height: 0.1 ft.
Total Erosion: 3.6973 tons/year
Severity: Severe
Year Inventoried: 2013
Inlet
Outlet
Upstream Conditions
Downstream Conditions
Road Approach - Left
Road Approach - Right
Crossing Information
Type of Crossing: culvert(s)
Number of Structures: 2
Structure Shape: Round
Inlet Type: Projecting
Outlet Type: At Stream Grade
Structure Material: Metal
Structure Substrate: Sand
General Conditions: Poor
Structure Interior: corrugated
Structure is Rusted through
Dimensions of Structure: Length 40 ft. , Width 5.5 ft. , Height 5.5 ft.
Perch Height: 0.1 ft.
Structure Inlet
Water Depth: 1.6 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
Structure Outlet
Water Depth: 0.5 ft.
Embedded Depth of Structure: 0 ft.
Water Velocity*: 0 ft./sec.
*Water Velocities were measured at the Surface (with Meter)
Additional Comments
Lots of algae in water below outlet, water cloudy on both sides. Culver # 2 is dry on the outlet side. Water not moving much, seems low, hard to tell inlet and outlet. Lots of crayfish in water.
Stream Information
Stream Flow: Less than Bankfull
Scour Pool: Length 0 ft. , Width 0 ft. , Depth 0 ft.
Upstream Pond: Length 10 ft. , Width 11.5 ft. , Depth 1.5 ft.
Riffle Information
Water Depth: 0.2 ft.
Bankfull Width: 10.5 ft.
Wetted Width: 4.8 ft.
Water Velocity: 0 ft./sec. (Measured with Meter)
Dominant Substrate: Gravel
Road Information
Gravel County Road
Road Condition: Fair
Road Width at Culvert: 19 ft.
Location of Low Point: At Stream
Runoff Path: Roadway
Embankments
Upstream
Fill Depth: 2.8 ft.
Slope: More than 1:2
Downstream
Fill Depth: 2.3 ft.
Slope: More than 1:2
Approaches
Left Approach
Length: 256 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.442
Erosion: 0.5928 tons/year
Right Approach
Length: 1000 ft.
Slope: 1% to 5%
Vegetation: Heavy
LS Factor: 0.57
Erosion: 2.9835 tons/year
Erosion Information
Total Erosion at Crossing: 3.6973 tons/year
Extent of Erosion: Severe
Erosion is occurring and corrective actions can be installed to address the problem.
Location of Erosion
Erosion Dimensions
Eroded Material
Material Eroded
Total Erosion
facing downstream
Length
Width
Depth
Reaching Stream?
(tons/year)
Left Upstream Embankment
3 ft.
2.2 ft.
0.6 ft.
no
Gravel
0.036
Left Upstream Embankment
2.1 ft.
1.7 ft.
0.6 ft.
no
Gravel
0.0252
Left Downstream Embankment
1.7 ft.
2.9 ft.
1.6 ft.
no
Sand
0.0598
Summary Information
Fish Passability 0
Erosion is an area of concern for this site. Yes, because there is an upstream pond, the culverts are in poor shape, and there is some erosion on the banks.
A future visit to this site is recommended. Because of the problems listed above and the poor water quality.
These non-native species were observerd at this site: Japanese knotweed